Red and near-infrared electroluminescence from organic light-emitting devices based on a soluble substituted metal-free phthalocyanine
作者： Zhaoqi Fan , Chuanhui Cheng , Shukun Yu , Kaiqi Ye , Rensheng Sheng
DOI: 10.1016/J.OPTMAT.2008.10.023
关键词: OLED 、 Chemistry 、 Substituent 、 Spin coating 、 Phthalocyanine 、 Vacuum deposition 、 Photochemistry 、 Electroluminescence 、 Doping 、 Infrared
摘要: Abstract Red and near-infrared (NIR) organic light-emitting devices (OLEDs) were fabricated based on Tetra (2-Isopropyl-5-methylphenoxyl) substituted metal-free phthalocyanine (Tetra-H2Pc). The by vacuum deposition spin coating methods. electroluminescence (EL) intensity at about 910 nm in the Tetra-H2Pc was increased 14 times compared with 930 nm unsubstituted (H2Pc) same device structures. improvement EL attributed to large steric hindrance of non-peripheral phenoxyl substituent Tetra-H2Pc. It found that NIR spectra doped exhibited a strong dependence concentration emission 740 nm from monomer, while emissions around 870 nm excimer or higher aggregated species.
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